This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX160S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI40 Standard Cylinder SI40BX160S
The AirTAC Airtac SI40 Standard Cylinder SI40BX160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX160S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI40 Standard Cylinder SI40BX160S
The AirTAC SI40BX160S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 160 mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40BX160S, matching the interface, stroke, force, and mounting. This unit features a SUS304 stainless steel rod for corrosion resistance and a built-in magnet for CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the SI line.
Airtac SI40 Standard Cylinder SI40BX160S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX160S |
| Bore size | Ø40 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40BX160S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAI40BX160S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40BX160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI40 Standard Cylinder SI40BX160S Is Used
Corrosive Material Handling
The SUS304 stainless rod excels in washdown or mildly corrosive environments, providing reliable 628 N push force for moving small parts.
Packaging Line Diversion
Delivers precise 160 mm stroke actuation at 30-800 mm/s to route cartons, with the built-in magnet confirming end-of-stroke positions.
Replacing the Airtac SI40 Standard Cylinder SI40BX160S with the SAI40BX160S
To replace the SI40BX160S, order the SAI40BX160S. Verify the ISO 15552 mounting interface, 40 mm bore, 160 mm stroke, G1/4 port (PT/G/NPT thread options), and the -S magnet for current AirTAC switches. Sizing both ways: a 32 mm bore yields 402 N push at 0.5 MPa, while a 50 mm bore yields 982 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SUS304 rod suits corrosive environments, and Viton H seals raise the temperature range to 0-150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX160S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40BX160S FAQ
Yes, the SI40BX160S is discontinued. The direct replacement is the SAI40BX160S. It is dimensionally interchangeable per ISO 15552, keeping the same 40 mm bore, 160 mm stroke, 628 N force, G1/4 port, and mounting fixtures.
The G1/4 port size is fixed by the 40 mm bore. Force ratings are: 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX160S replacement — usually within 7-8 hours.